Re: [Bug #32982] Kernel locks up a few minutes after boot

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On Mon, 2011-04-18 at 20:21 +0200, Bart Van Assche wrote:
> On Mon, Apr 18, 2011 at 1:44 PM, Jens Axboe <jaxboe@xxxxxxxxxxxx> wrote:
> > Bart, can you try and pull:
> >
> > git:// for-linus
> >
> > into Linus' tree and see if that works? This has, among other things,
> > Neils fixes for MD.
> md seems to work stable with the resulting tree, but it looks there is
> a performance regression in the block layer not related to the md
> issue. If I run a small block IOPS test on a block device created by
> ib_srp (NOOP scheduler) I see about 11% less IOPS than with
> (155.000 IOPS with and 140.000 IOPS with 2.6.39-rc3+).

The mapping code for ib_srp changed in 2.6.39-rc1, but it showed
improved IOPS for a similar setup in my testing so I'd be surprised if
it is the culprit. Still, it wouldn't hurt to check. Do you have time to
try the new ib_srp code with to eliminate it from the equation?


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